Deep Groove Ball Bearings SKF 6404

The SKF 6404 single-row deep groove ball bearing accommodates both radial and axial loads and has a bore diameter of 20 mm, an outside diameter of 72 mm and a width of 19 mm.

The 6404 deep-groove ball bearing is a versatile open-type rolling bearing. Thanks to its deep raceway geometry, this bearing accommodates radial forces as well as axial loads in both directions. Manufactured from 100Cr6 rolling-bearing steel, SKF’s design provides a solid foundation for continuous industrial operation. Thanks to the standard tolerance P0, the ball bearing can be integrated directly into standardised housings, whilst the standard radial clearance is designed for normal operating temperatures between –20 and +120 degrees.

What requirements does the 6404 deep groove ball bearing meet in service?

Applications involving high radial loads with a comparatively compact shaft diameter represent the primary area of use. The outer diameter of 72 mm with a 20-mm bore provides the component with stable guidance. The guided sheet-steel cage is designed for demanding speed ranges, and as there are no sliding seals, no additional friction losses occur.

What are the key features of the open design of the 6404 deep groove ball bearing?

The open design, without integrated cover or sealing plates, allows for the direct supply of lubricants from the system, for example via oil circulation or immersion lubrication. This results in low friction coefficients and moderate operating temperatures during continuous operation. Surrounding seals in the housing protect the bearing location from dirt and moisture. For applications with standard requirements, the Normal (PN) tolerance class in conjunction with the standard bearing clearance is sufficient, as no thermal expansion allowance is required.